diff --git a/src/newgrf_debug_gui.cpp b/src/newgrf_debug_gui.cpp
index b8987e3a16..70321240df 100644
--- a/src/newgrf_debug_gui.cpp
+++ b/src/newgrf_debug_gui.cpp
@@ -623,6 +623,7 @@ struct NewGRFInspectWindow : Window {
 				::DrawString(ir.left, ir.right, ir.top + (scroll_offset * this->resize.step_height), buf, colour);
 			});
 			dumper.use_shadows = this->sprite_dump_unopt;
+			dumper.more_details = HasBit(_misc_debug_flags, MDF_NEWGRF_SG_DUMP_MORE_DETAIL);
 			nih->SpriteDump(index, dumper);
 			return;
 		} else {
diff --git a/src/newgrf_spritegroup.cpp b/src/newgrf_spritegroup.cpp
index 265839c499..10fa226f6c 100644
--- a/src/newgrf_spritegroup.cpp
+++ b/src/newgrf_spritegroup.cpp
@@ -480,7 +480,7 @@ static char *GetAdjustOperationName(char *str, const char *last, DeterministicSp
 	return str + seprintf(str, last, "\?\?\?(0x%X)", operation);
 }
 
-static char *DumpSpriteGroupAdjust(char *p, const char *last, const DeterministicSpriteGroupAdjust &adjust, const char *padding, uint32 &highlight_tag, uint &conditional_indent)
+char *SpriteGroupDumper::DumpSpriteGroupAdjust(char *p, const char *last, const DeterministicSpriteGroupAdjust &adjust, const char *padding, uint32 &highlight_tag, uint &conditional_indent)
 {
 	if (adjust.variable == 0x7D) {
 		/* Temp storage load */
@@ -503,10 +503,10 @@ static char *DumpSpriteGroupAdjust(char *p, const char *last, const Deterministi
 		if (adjust.adjust_flags & DSGAF_SKIP_ON_LSB_SET) {
 			p += seprintf(p, last, ", skip on LSB set");
 		}
-		if (adjust.adjust_flags & DSGAF_LAST_VAR_READ && HasBit(_misc_debug_flags, MDF_NEWGRF_SG_DUMP_MORE_DETAIL)) {
+		if (adjust.adjust_flags & DSGAF_LAST_VAR_READ && this->more_details) {
 			p += seprintf(p, last, ", last var read");
 		}
-		if (adjust.adjust_flags & DSGAF_JUMP_INS_HINT && HasBit(_misc_debug_flags, MDF_NEWGRF_SG_DUMP_MORE_DETAIL)) {
+		if (adjust.adjust_flags & DSGAF_JUMP_INS_HINT && this->more_details) {
 			p += seprintf(p, last, ", jump ins hint");
 		}
 		if (adjust.adjust_flags & DSGAF_END_BLOCK) {
@@ -619,7 +619,7 @@ void SpriteGroupDumper::DumpSpriteGroup(const SpriteGroup *sg, const char *paddi
 	char extra_info[64] = "";
 	if (sg->sg_flags & SGF_ACTION6) strecat(extra_info, " (action 6 modified)", lastof(extra_info));
 	if (sg->sg_flags & SGF_SKIP_CB) strecat(extra_info, " (skip CB)", lastof(extra_info));
-	if (HasBit(_misc_debug_flags, MDF_NEWGRF_SG_DUMP_MORE_DETAIL)) {
+	if (this->more_details) {
 		if (sg->sg_flags & SGF_INLINING) strecat(extra_info, " (inlining)", lastof(extra_info));
 	}
 
@@ -719,7 +719,7 @@ void SpriteGroupDumper::DumpSpriteGroup(const SpriteGroup *sg, const char *paddi
 			char *p = this->buffer;
 			p += seprintf(p, lastof(this->buffer), "%sDeterministic (%s, %s)%s [%u]",
 					padding, get_scope_name(dsg->var_scope, dsg->var_scope_count), _sg_size_names[dsg->size], extra_info, dsg->nfo_line);
-			if (HasBit(_misc_debug_flags, MDF_NEWGRF_SG_DUMP_MORE_DETAIL)) {
+			if (this->more_details) {
 				if (dsg->dsg_flags & DSGF_NO_DSE) p += seprintf(p, lastof(this->buffer), ", NO_DSE");
 				if (dsg->dsg_flags & DSGF_VAR_TRACKING_PENDING) p += seprintf(p, lastof(this->buffer), ", VAR_PENDING");
 				if (dsg->dsg_flags & DSGF_REQUIRES_VAR1C) p += seprintf(p, lastof(this->buffer), ", REQ_1C");
@@ -735,7 +735,7 @@ void SpriteGroupDumper::DumpSpriteGroup(const SpriteGroup *sg, const char *paddi
 			sub_padding += "  ";
 			uint conditional_indent = 0;
 			for (const auto &adjust : (*adjusts)) {
-				DumpSpriteGroupAdjust(this->buffer, lastof(this->buffer), adjust, sub_padding.c_str(), highlight_tag, conditional_indent);
+				this->DumpSpriteGroupAdjust(this->buffer, lastof(this->buffer), adjust, sub_padding.c_str(), highlight_tag, conditional_indent);
 				print();
 				if (adjust.variable == 0x7E && adjust.subroutine != nullptr) {
 					std::string subroutine_padding(sub_padding);
@@ -761,7 +761,7 @@ void SpriteGroupDumper::DumpSpriteGroup(const SpriteGroup *sg, const char *paddi
 							p += seprintf(p, lastof(this->buffer), " (%s)", cb_name);
 						}
 					}
-					if (HasBit(_misc_debug_flags, MDF_NEWGRF_SG_DUMP_MORE_DETAIL) && range.group == dsg->error_group) {
+					if (this->more_details && range.group == dsg->error_group) {
 						p += seprintf(p, lastof(this->buffer), " (error_group)");
 					}
 					print();
@@ -770,7 +770,7 @@ void SpriteGroupDumper::DumpSpriteGroup(const SpriteGroup *sg, const char *paddi
 				if (default_group != nullptr) {
 					char *p = this->buffer;
 					p += seprintf(p, lastof(this->buffer), "%sdefault", padding);
-					if (HasBit(_misc_debug_flags, MDF_NEWGRF_SG_DUMP_MORE_DETAIL) && default_group == dsg->error_group) {
+					if (this->more_details && default_group == dsg->error_group) {
 						p += seprintf(p, lastof(this->buffer), " (error_group)");
 					}
 					print();
diff --git a/src/newgrf_spritegroup.h b/src/newgrf_spritegroup.h
index 8191b261eb..86beb1c610 100644
--- a/src/newgrf_spritegroup.h
+++ b/src/newgrf_spritegroup.h
@@ -771,6 +771,7 @@ using DumpSpriteGroupPrinter = std::function<void(const SpriteGroup *, DumpSprit
 
 struct SpriteGroupDumper {
 	bool use_shadows = false;
+	bool more_details = false;
 
 private:
 	char buffer[1024];
@@ -785,6 +786,7 @@ private:
 		SGDF_RANGE            = 1 << 1,
 	};
 
+	char *DumpSpriteGroupAdjust(char *p, const char *last, const DeterministicSpriteGroupAdjust &adjust, const char *padding, uint32 &highlight_tag, uint &conditional_indent);
 	void DumpSpriteGroup(const SpriteGroup *sg, const char *prefix, uint flags);
 
 public: